Daniel l



Filed serr. 12 1921 Patented Sept. 11, 1923.

UNITED STATES DANIEL L. HALL, OF COLUMBIA, SOUTH CAROLINA.

DENTAL FILM HOLDER'.

Application filed September'm, 1921. Serial No. 499,934.

nor ma rino' ra io rtra i, o" 1. 1e t ow f l h d g )ls ttleLeh,the h ject being to provide a holder which will hold the lilm pack within the mouth of the patient at approximately right angles to the rays so as to prevent the images on the neg atives from being distorted.

A further object of the invention is to provide a holder which is so constructed that it can be adjusted for taking radiographs of the uppers and lowers, the position of the film pack in the mouth being` determined by the position of the handle so that the patient as well as the photographer 25 can readily adjust the film pack within the mouth in order to enable the rays to strike the lilm at approximately right angles un-y der all conditions.

A still further object of the invention is to provide a film holder which is exceedingly simple and cheap in construction and one which is capable of being adjusted into.

a number of positions so that the film can be held at the proper angle for taking uppers and lowers on eitherside.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the drawings,

Figure l is a perspective view of a dental film holder i constructed in accordance with my invention showing a film pack in position in dotted lines;

Figure 2 is a longitudinal section partly broken away;

Figure 3 is a section taken on line 3-3 of Figure 2; and

Figure l is an elevation partly broken away showing the holder adjusted in various positions in dotted lines.

In the drawing 1 indicates a handle herein shown formed of a loop yof metal having its end portions 2 bent back over a filler 3 and secured by a rivet `'l. The filler 3 terminates short of the end portions 2 and has its ends cut olf to form obliquo shoulders 5 and 6 as clearly shown in Figure 3.

'll/bile lV have shown a handle construct-- ed in this particular manner I ain aware vthat the same can be constructed in various other ways, as for instance, a handle could be formed solid with a bifurcated end and I do not wish to limit myself to the details of construction herein shown.

Pivotally mounted between the end portions 2 of the handle on a rivet 7 is an arin 8 having lateral projections 9 and l() provided with oblique faces adapted to coop-erate with the oblique shoulders 5 and G for supporting` the arm at right angles to the handle as clearly shown.

Slidably mounted on the end portions 2 o" the handle is a locking collar ll which is adapted to embrace tbe projections 9 and hold the oblique faces in contact with the` oblique shoulders as clearly shown in Figure 3 for rigidly locking the arm at right angles to the handle upon either side as shown in Figure l. The movement of the locking collar is limited by a stop pin l2 extending transversely through the end portions 2 in filler 3. A

Pivotally mounted on the extreme end of the arm 8 is a film pack holder 18 composed of a vertical member 14C against which the film pack is adapted to be placed, said member having a lateral projecting portion 13 forming a support for the lower edge of the film pack, said lateral projecting portion being provided with a flange 16 for holding the film pack against the member 14.

Extending laterally from the flange 16 is a projection 17 which is adapted to engage the teeth so as to position the film pack within the mouth of the patient while making the radiographs.

The holder is preferably formed of aluminum which is easily penetrated by the rays so as to prevent shadows from being formed on the negative when a radiograph is being made.

I have found from practical experience that it is very difiicult to hold a film pack in position within the mouth at the proper angle so as to make a negative of the teeth which will show the apex of the teeth proprerly as there is nothing to actually determine the position of the tilm parli within the u'iouth of the patient, While with in v deviee l provide means Yfor holdinic the ilaa paci: in Such a manner that the patient grips the holderI so that vthe lilm pael: will be held in the mouth to enable the entire tooth to be taken and by havingr the arm arranged at right angles to the handle` the angle of the tihn pael Wit-hin the mouth ean he adjusted and held by the patient so as to prevent the images on the negatives; from being,` distorted ass ilI the lilni pack is not held al; aoproximately right angles to Vthe X-ray 'tube the image will either be shortened o'r lengtheued.

llroni the it'oregoing description it will he seen that l have provided a. dental liln'i ladder (iouij'ioselfl oilt a handle having an arin pivotalljY mounted thereon Capable oit beine; adjusted and loeled at right angles, to the handle on either sideI` said aru carrying" a, ji-ivoted holder which van he inverted eo as to hold a pack 'tor 'triltii'ioj uppers and lowers.

By forming the holder in the j'iartieular manner shown the lilzn molt an he "ihufed in position upon the Support and bent so au to outorui to the curvature oli the teeth. llfhile l have Shown certain detailsl ol' eonstrlution l do not wish to limit nivsiell! to anjv nartieulur manner of constructing the, various parte as l ain aware 'that various changes an he made without departing troni the Spirit ol in v invention.

`What l claim i5):-

l. 'tihn holder etunprisiing an arm adjustahlj7 mounted on Said handle. and mount, ed to swing in the Sauie plane ol' the haudlt-i and a lilni holder earried b v the end of the arm and mounted to Swing' in the saine plane as the arm.

Q. A tihn holder comprising a handle hav Ving` an adjustable arm and mounted to swing in the saine plane as the handle and u lilin peek supporting member having lateral projection ilior engaging the teeth adj ustably mounted on said arm and mounted to Swing in the saine plane as the arm.

a. il iihn holder eon'iprising a handle having an arm pivotally mounted thereon, means for looking said arm at right angles to Said handle and a lilui pack holder pivotally mounted on the end of said arm and .n'iounted to Suf'ing in the same plane as the arm.

Kl. A. dental film holder Comprising a handle having a hi'turea-ted end, an arin pivotally mounted in Said bii'ureaied end having projections provided With oblique tures, said handle having` oblique Sl'ioulders adapted lo he engaged by Said oblique 'tacos` a loeltingY sleeve slidahljv n'iounted upon Said handle 'tor locking said arm at right angleS to Said handle and a Flin pael holder carried by the treo end olf eaid arui.

5. fr lilin holder comprising` a handle, an arni movablv Carried by the handle and a i'ilin paul( ipport inovabljf' carried by the iree end ot Said arm, said arm and puel( sul port l'zeiug `rizoiuiied to uiove iu the Saaie plane.

(i. fr [ihn holder Comprising' a bitureated handle having an arm pivotallv mounted therein, Said arni heine` capable ol swinging to either side oii the handle. means Ylor limiting; the swingingv movement o'lt said arni for holding Said arm at right angles to Said handle. meanS tor locking said arm in adjusted position and a ilm holder pivotally mounted on the tree end ol' Sai-d arm.

7. dental film holder comprising a pivoted arm having' a pivoted lihn holder mounted on the Ytree end thereol"` Said pivotal Vfilm hold er being' Capable o't being swung to either side oiI Said arm. Said arm und holder being` mounted to swing iu the same plaine. Y

ln testimonj7 whereof l hereunto atliX my Signature.

DANIEL L. HALL. 

